CN105445782B - One kind is without positioning streamer cables multichannel seismic exploration observation system generation method - Google Patents
One kind is without positioning streamer cables multichannel seismic exploration observation system generation method Download PDFInfo
- Publication number
- CN105445782B CN105445782B CN201510907708.XA CN201510907708A CN105445782B CN 105445782 B CN105445782 B CN 105445782B CN 201510907708 A CN201510907708 A CN 201510907708A CN 105445782 B CN105445782 B CN 105445782B
- Authority
- CN
- China
- Prior art keywords
- shot point
- reception channel
- focus
- actual coordinate
- observation system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses one kind without positioning streamer cables multichannel seismic exploration observation system generation method, including step：The actual coordinate of focus shot point is obtained, and generates focus shot point track；According to the focus shot point track and actual coordinate, with reference to the locus for towing each reception channel of state simulation algorithm simulation；According to the locus, the actual coordinate of each reception channel is calculated than weighted linear interpolation algorithm with reference to anti-distance；Layout chart is drawn according to the actual coordinate for receiving arrangement.This method of the present invention can obtain the actual coordinate for receiving arrangement, so as to generate observation system according to the actual coordinate, the defects of avoiding traditional hypothesis mode, the accuracy of reflection stratum imaging precision and image space is improved, it can provide reliable cross-sectional data for follow-up geologic interpretation.
Description
Technical field
The present invention relates to ocean engineering seismic exploration technique, more particularly to one kind to observe without positioning streamer cables multichannel seismic exploration
System generation method.
Background technology
At sea in oil-gas exploration, multiple tracks earthquake-capturing is all received using long array main road spacing, is receiving the head and the tail of cable
And interlude is provided with the location equipment such as aquatic bird and tail tag at regular intervals, by these location equipments, during ground observation with
Gps antenna is reference point on exploration ship, the plane projection coordinate of the actual longitude and latitude of each reception channel can be calculated in real time, in data
These coordinate can accurate definition field layouts are utilized in processing.
And in ocean engineering seismic prospecting, use short arrangement to receive towing cable, it is general not in towing cable during field work
The upper installation location equipment such as aquatic bird and tail tag, makes the actual coordinate in towing cable Shang Ge roads can not directly calculate, and this is resulted in can not be accurate
Really generation observation system.Processing method general at present is not consider the actual exploration situation in field, using the complete straight line of hypothesis
Method of the boat with receiving is run, that is, assumes that one simply defines relative observation system with reference to starting point, and give no thought to actual exploration
The ship trajectory of ship and speed state, and assume that shot point is completely superposed with receiving arrangement, according to observation side completely arranged in a straight line
Method, artificial to assume that first bombard maximum offset reception channel be 0 point of coordinate, recycling big gun spacing, smallest offset are away from road spacing etc.
Parameter, the relative position coordinates that each big gun is referred to 0 point of hypothesis with reception channel is calculated successively, finally further according to these relative coordinate values
Simple generation field layout figure.
Although it is simple and easy to generate observation system by above-mentioned method, because marine actual exploration ship is usually
Run by zig-zaging boat along design survey line left and right deviation, and ship's speed is unstable, if being blown out by constant duration, big gun spacing is not just fixed, and is pressed
It is assumed above to wait big gun spacing straight line geometry definition method to bring very big error, influence follow-up data processing precision with
Imaging effect, therefore, the degree of accuracy of the observation system generated by the above method are very poor, are differed greatly with actual exploration situation.
Further, since accurate actual geodetic coordinates can not be obtained, without actual XY coordinates in final CDP cross-sectional datas, to follow-up section
High accuracy explain bring it is unfavorable.
In view of this, need a kind of reliable actual observation system generation method badly at present, surveyed with solving ocean engineering earthquake
Actual application problem in spy.
The content of the invention
The technical problems to be solved by the invention are, there is provided a kind of to be given birth to without positioning streamer cables multichannel seismic exploration observation system
Into method, it can obtain the actual coordinate for receiving arrangement, so as to generate observation system according to the actual coordinate, avoid tradition
Assuming that the defects of mode, improve the accuracy of reflection stratum imaging precision and image space, it can be follow-up geologic interpretation
Reliable cross-sectional data is provided.
In order to solve the above-mentioned technical problem, given birth to the invention provides one kind without positioning streamer cables multichannel seismic exploration observation system
Into method, it includes：
The actual coordinate of focus shot point is obtained, and generates focus shot point track；
According to the focus shot point track and actual coordinate, with reference to the space for towing each reception channel of state simulation algorithm simulation
Position；
According to the locus, the actual seat for receiving arrangement is calculated than weighted linear interpolation algorithm with reference to anti-distance
Mark；
Layout chart is drawn according to the actual coordinate for receiving arrangement.
Further, each reception channel locus simulation algorithm calculation formula is：
Wherein,
The distance between i-th of reception channel to be asked and arrangement focus shot point, δminTo arrange upper smallest offset away from Δ X is road
Spacing, n refer to that between reception channel to be asked and focus shot point distance is n times of big gun spacing, i.e., the reception channel to be asked on shot point track
Nearest focus shot position nearby, Δ S be big gun spacing, and Q is azimuth of the reception channel to be asked on focus arranges, YnTo wait to ask
Nearest focus shot point coordinate, Y near reception channelsFor the coordinate of current focus shot point, DsnThe distance between two shot points.Utilize focus
Shot point actual path coordinate, then each reception channel approximate spatial locations are simulated by variable n above and Q cans.
Further, the anti-distance is than weighted linear interpolation algorithm calculation formula：
Wherein,
Border is sat for reception channel to be asked is actual,The shot point coordinate calculated is nearby participated in for reception channel,
The distance between reception channel to be asked and shot point,To participate in distance between the shot point of head and the tail two calculated, N is the total big gun for participating in calculating
Number, and N >=2.
Further, the step of actual coordinate of the accurate focus shot point of acquisition specifically includes step：
Focus position is set to the center of navigator fix, and obtains the dynamic position of focus in real time；
Epicenter excitation, and shot point coordinate of the record storage per big gun are triggered at equal intervals, generate focus shot point flight path.
Implement the embodiment of the present invention, have the advantages that：
The present invention without positioning streamer cables multichannel seismic exploration observation system generation method and device, it can obtain reception row
The actual coordinate of row, so as to generate observation system according to the actual coordinate, the defects of avoiding traditional hypothesis mode, improve reflection
The accuracy of formation imaging precision and image space, it can provide reliable cross-sectional data for follow-up geologic interpretation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that the observation system that the straight line obtained by conventional method is assumed and its common midpoint stack number shake with actual
Source excitation track line (round dot) figure；
Fig. 2 is a kind of stream of an embodiment of no positioning streamer cables multichannel seismic exploration observation system generation method of the present invention
Cheng Tu；
Fig. 3 is that certain big gun calculated using focus shot point trace simulation receives arrangement locus figure；
Fig. 4 is the sight that without positioning streamer cables multichannel seismic exploration observation system generation method is generated of the reaction using the present invention
Examining system and its common reflection point degree of covering complex chart；
Fig. 5 is the last stacked section schematic diagram obtained using traditional complete straight line observation system；
Fig. 6 is surveyed using the bending generated without positioning streamer cables multichannel seismic exploration observation system generation method of the present invention
The superposition migrated section schematic diagram that the processing of line observation system obtains.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 2, for an a kind of implementation of no positioning streamer cables multichannel seismic exploration observation system generation method of the present invention
The flow chart of example.Specifically, the observation system generation method specifically includes step in the present embodiment：
S11, obtains the actual coordinate of focus shot point, and generates focus shot point track.
At present, it is specific real as the high speed development of Satellite Navigation Technique, the actual coordinate of focus shot point are easier to realize
Shi Shi, it is only necessary to reference to corresponding supporting hardware device and navigation software.Specifically, step S11 includes step：
1) focus position is set to the center of navigator fix, and obtains the dynamic position of focus in real time.
Due in ocean engineering seismic prospecting, usually by focus (such as focus gun) drag and drop in away from exploration stern compared with low coverage
From water in, such as 10 meters or so, therefore, differential GPS signal real-time navigation can be utilized by installing gps antenna on exploration ship
And the dynamic position for positioning exploration ship can obtain the dynamic position of focus.
Further, for the accurate location of focus in being explored, when it is implemented, can be by gps antenna design and installation
On the quarter and close to the home of focus, and distance of the focus gun away from gps antenna is measured, while in navigation software, will
Focus position is set to the center of navigator fix, is obtained in real time by navigation software and shows the dynamic position of focus.
2) epicenter excitation, and shot point coordinate of the record storage per big gun are triggered at equal intervals, generate focus shot point flight path.
Can be when waiting or equidistant at equal intervals in the present embodiment.When it is implemented, by during navigation software etc. or equidistant
Ground sends trigger signal to focus, and to trigger epicenter excitation, and record storage excites position (i.e. shot position), and root per big gun
Focus shot point flight path, the focus shot point track that round dot as shown in Figure 1 is formed are generated according to each shot position.
In the present embodiment, after getting actual coordinate and the track of accurate focus shot point, it is possible to related by designing
Algorithm simulation, which goes out, receives effective coordinate that each reception channel arranged is referred to actual hypocentral location.
S13, according to the focus shot point track obtained in step S11 and actual coordinate, with reference to towing state simulation algorithm mould
Intend receiving the locus in arrangement where each reception channel.
When it is implemented, being influenceed during ground observation by many factors such as operational configuration of stormy waves, ocean current, exploration ship, drag
Be put in stern and receive cable, such as 6.25 meters of towing cables of road spacing 24 more than the multiple tracks of hundred meters of distances, most a long way disembarkation tail more than 150
Rice.Therefore, state of the whole piece cable in water and non-rectilinear, i.e., under non-orderly sea, its form may be serpentine bending.By
Towed substantially along the focus shot point track in the reception channel of arrangement nearby, but when sea situation is poor, arrange the reception channel of distant place but
Not necessarily towed along the focus shot point track, therefore, actual conditions understand some deviations, however, being directed in the present embodiment short
Arrangement receives towing cable, and therefore, even if sea situation is poor, the deviation arranged between reception channel and focus shot point track also will not be very big.
To sum up, the present embodiment order receives each reception channel of arrangement and towed substantially along the focus shot point track, then by design, by this hair
It is bright it is special tow state simulation algorithm, can preferably simulate all road relative tertiary locations：I.e. firstly the need of according to step
The focus shot point track generated in rapid S11, the offset distance for receiving each reception channel in arrangement is calculated, then, further according to being calculated
The offset distance of each reception channel calculate the locus for receiving that each reception channel is residing on focus shot point track in arrangement.Specifically
Ground, in the present embodiment, receive and arrange the locus simulation algorithm calculation formula in each road and be：
Wherein,The distance between i-th of reception channel to be asked and arrangement focus shot point, δminTo arrange upper smallest offset away from Δ
X is road spacing, and n refers to that distance between reception channel and focus shot point to be asked is n times of big gun spacing, i.e., waits to ask on focus shot point track
Nearest focus shot position near reception channel, Δ S are big gun spacing, and Q is azimuth of the reception channel to be asked in focus arrangement, Yn
For focus shot point coordinate nearest near reception channel to be asked, YsFor the coordinate of current focus shot point, DsnThe distance between two shot points.Profit
Each reception channel approximate spatial locations are simulated with focus shot point actual path coordinate, then by variable n above and Q cans.
S15, according to above-mentioned locus, it is calculated with reference to anti-distance than weighted linear interpolation algorithm in reception arrangement respectively
The actual coordinate of reception channel.
Since it is known that focus shot point track and its actual coordinate, also simulate reception and are arranged in when exploration ship tows
Form may be extended, obtain relative tertiary location of each reception channel in shot point track, therefore, can be tied according to the locus
Close the actual coordinate that each reception channel is calculated than weighted linear interpolation algorithm for anti-distance.Specifically, in the present embodiment, this instead away from
It is from than weight interpolation algorithm calculation formula：
Wherein,For reception channel actual coordinate to be asked,The shot point coordinate calculated is nearby participated in for reception channel,The distance between reception channel to be asked and shot point,To participate in distance between the shot point of head and the tail two calculated, N is the total of participation calculating
Big gun number, and N >=2.
In the present embodiment, the selection of N values will be depending on the degree of crook of focus shot point track, for comparing flat segments rail
Mark, N values take 2, and for the more severe track of bending such as turn round, N value answer it is larger preferably i.e. value is bigger, with shake
Source shot point track fitting it is more preferable.AndShow away from solving the nearer shot point of reception channel, its anti-distance than
Interpolation coefficient is bigger, and the contribution calculated coordinate value is also bigger, it is possible thereby to simulate the stressing conditions of towing cable in actual exploration
With towing state.
S17, observation system is drawn according to the actual coordinate of each reception channel in the reception arrangement being calculated in above-mentioned steps S15
System figure.
With reference to specific example and accompanying drawing, the present invention will be described in detail.
When it is implemented, engineering exploration, using 24 12.5 meters of road spacing towing cables, explosive source is 210 cubic inches
GI air guns, epicenter excitation are equidistantly blown out using 25 meters, and smallest offset is away from for 40 meters.According to theoretical calculation, the reflection seismic
CDP degree of covering average out to 6 times.In exploration process, the dynamic position of focus is acquired in real time, obtains the reality of focus shot point
Coordinate, and generate corresponding focus shot point track, then in calculated permutations each reception channel offset distance, according to the focus shot point track
It is as shown in Figure 3 that certain big gun reception arrangement locus is calculated with offset distance simulation.No. 933 round dots are current row to be calculated in Fig. 3
Row are blown out a little, and triangle is 24 reception channel positions to be solved, and during solution, N values take 3, i.e., 2 big guns are taken before reception channel to be solved
Point, after take 1 shot point, and according to shot point and solve the anti-distance between reception channel and be used for linear interpolation coefficient, calculate as
Reception channel space arrangement relation and its actual coordinate figure shown in figure.Finally these actual seats are called in using the processing software of specialty
Mark, observation system spatial relationship corresponding to definition, professional treatment software are depicted such as figure according to observation system actual coordinate parameter
Common midpoint coverage number and Rankine-Hugoniot relations figure shown in 4.From fig. 4, it can be seen that given birth to by the observation system of the present embodiment
The observation system CMP position defined into method relatively coincide actual conditions, common midpoint coverage number also than more uniform,
Do not occur relatively large deviation as shown in Figure 1.It follows that the reception obtained using the observation system generation method of the present embodiment
Arrange track and focus shot point track fitting is preferable, i.e., using observation system as shown in Figure 4 caused by the method for the present embodiment
Actual crooked line is close to, and Fig. 1 is based on the imaginary observation of straight line completely, both common midpoint degree of covering are
Difference, locus is entirely different, increase and decrease situation suddenly occurs based on the superposition number that straight line is assumed in track knee, and schemes
4 than more uniform.Using Fig. 1 and Fig. 4 observation system, a variety of methods processing through follow-up identical parameters, obtain respectively such as Fig. 5
Stacked section and Fig. 6 shown in post-stack migration Profile Correlation figure, without actual XY coordinates in Fig. 5, and with accurately real in Fig. 6
Border coordinate, because observation system is different, after same method parameter multiple suppression, the multiple wave pressure system in Fig. 6 is substantially better than
Fig. 5.The result such as crooked line observation system i.e. caused by the method for the present embodiment, follow-up multiple wave pressure is substantially excellent
In traditional straight line observation system result, this is due to the difference of observation system, causes the difference of CMP trace gathers, and then after influence
The validity of continuous processing method.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, one of ordinary skill in the art will appreciate that all or part of flow of above-described embodiment is realized, and will according to right of the present invention
Made equivalent variations are sought, still falls within and invents covered scope.
Claims (5)
1. one kind is without positioning streamer cables multichannel seismic exploration observation system generation method, it is characterised in that including step：
The actual coordinate of focus shot point is obtained, and generates focus shot point track；
According to the focus shot point track and actual coordinate, with reference to the space bit for towing each reception channel of state simulation algorithm simulation
Put；
According to the locus, the actual coordinate of each reception channel is calculated than weighted linear interpolation algorithm with reference to anti-distance；
Layout chart is drawn according to the actual coordinate for receiving arrangement；
Wherein, it is described tow state simulation algorithm simulation locus calculation formula be：
Wherein,
The distance between i-th of reception channel to be asked and arrangement focus shot point, δminTo arrange upper smallest offset away from Δ X is between road
Refer to that distance between reception channel and focus shot point to be asked is n times of big gun spacing away from, n, Δ S is big gun spacing, and Q is that reception channel to be asked is shaking
Azimuth in the arrangement of source, YnFor focus shot point coordinate nearest near reception channel to be asked, YsFor the coordinate of current focus shot point,
DsnThe distance between two shot points.
2. as claimed in claim 1 without positioning streamer cables multichannel seismic exploration observation system generation method, it is characterised in that described
Anti- distance is than weighted linear interpolation algorithm calculation formula：
Wherein,
For reception channel actual coordinate to be asked,The shot point coordinate calculated is nearby participated in for reception channel,To wait to ask
Distance between reception channel and shot point,Distance between the shot point of head and the tail two calculated for participation, total big gun number that N calculates for participation, and N >=
2。
3. as claimed in claim 2 without positioning streamer cables multichannel seismic exploration observation system generation method, it is characterised in that work as shake
When source shot point track is flat segments track, N values take 2.
4. as claimed in claim 2 without positioning streamer cables multichannel seismic exploration observation system generation method, it is characterised in that described
The step of actual coordinate for obtaining focus shot point, specifically includes step：
Focus position is set to the center of navigator fix, and obtains the dynamic position of focus in real time；
Epicenter excitation, and shot point coordinate of the record storage per big gun, generation focus shot point track are triggered at equal intervals.
5. as claimed in claim 1 without positioning streamer cables multichannel seismic exploration observation system generation method, it is characterised in that described
According to the focus shot point track and actual coordinate, with reference to the step for the locus for towing each reception channel of state simulation algorithm simulation
Suddenly specifically include：
According to the focus shot point track of generation, the offset distance for receiving each reception channel in arrangement is calculated；
Calculated according to the offset distance and receive the locus that each reception channel is residing on focus shot point track in arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510907708.XA CN105445782B (en) | 2015-12-09 | 2015-12-09 | One kind is without positioning streamer cables multichannel seismic exploration observation system generation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510907708.XA CN105445782B (en) | 2015-12-09 | 2015-12-09 | One kind is without positioning streamer cables multichannel seismic exploration observation system generation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105445782A CN105445782A (en) | 2016-03-30 |
| CN105445782B true CN105445782B (en) | 2017-11-24 |
Family
ID=55556194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510907708.XA Active CN105445782B (en) | 2015-12-09 | 2015-12-09 | One kind is without positioning streamer cables multichannel seismic exploration observation system generation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105445782B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772594B (en) * | 2016-11-21 | 2018-07-31 | 国家海洋局第二海洋研究所 | It is a kind of to be applied to the shallow automatic correcting method for cuing open reflectance data body of deep water |
| CN106970415A (en) * | 2017-02-27 | 2017-07-21 | 中国石油天然气集团公司 | It is determined that method, device and the electronic equipment of the track of navigation focus |
| CN113945965A (en) * | 2020-07-17 | 2022-01-18 | 中国石油天然气股份有限公司 | Seismic data monitoring method and device |
| CN112394378A (en) * | 2020-11-05 | 2021-02-23 | 广州海洋地质调查局 | Correction method and processing terminal for observation point position of marine geophysical prospecting platform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012524A (en) * | 2010-09-29 | 2011-04-13 | 中国海洋石油总公司 | Quantitative assessment method for feathering drifting of maritime three-dimensional seismological observation system |
| CN204556851U (en) * | 2015-01-26 | 2015-08-12 | 中国海洋石油总公司 | A kind of subsea cable Omnibearing earthquake auto gathers recording geometry |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7400552B2 (en) * | 2006-01-19 | 2008-07-15 | Westerngeco L.L.C. | Methods and systems for efficiently acquiring towed streamer seismic surveys |
| US9759828B2 (en) * | 2011-02-02 | 2017-09-12 | Westerngeco L.L.C. | Determining a streamer position |
-
2015
- 2015-12-09 CN CN201510907708.XA patent/CN105445782B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012524A (en) * | 2010-09-29 | 2011-04-13 | 中国海洋石油总公司 | Quantitative assessment method for feathering drifting of maritime three-dimensional seismological observation system |
| CN204556851U (en) * | 2015-01-26 | 2015-08-12 | 中国海洋石油总公司 | A kind of subsea cable Omnibearing earthquake auto gathers recording geometry |
Non-Patent Citations (2)
| Title |
|---|
| 海上地震采集观测系统研究现状与展望;李欣 等;《西南石油大学学报（自然科学版）》;20141031;第36卷(第5期);第67-80页 * |
| 海洋地震拖缆操控定位系统;蔡晔敏 等;《产业与科技论坛》;20121231;第11卷(第5期);第109-110页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105445782A (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8737163B2 (en) | Wide seismic source systems | |
| US9529108B2 (en) | Methods and apparatus for determining seismic streamer array geometry and seismic sensor response | |
| US9116257B2 (en) | Method and apparatus for sea current aided, enhanced azimuth seismic data acquisition | |
| CN105445782B (en) | One kind is without positioning streamer cables multichannel seismic exploration observation system generation method | |
| AU2016204606B2 (en) | Methods and devices for enhanced survey data collection | |
| US9678230B2 (en) | Method and device for marine seismic acquisition | |
| WO2009048683A2 (en) | Controlling seismic source elements based on determining a three-dimensional geometry of the seismic source elements | |
| US20160139284A1 (en) | Marine seismic patterns for coordinated turning of towing vessels and methods therefor | |
| US11802986B2 (en) | Hybrid ocean bottom seismic receiver and streamer seismic data acquisition using wide towed sources | |
| US10520631B2 (en) | Magnetic field measurement via streamer cables | |
| CN112505750A (en) | Deep-towed multi-channel seismic streamer attitude determination method and processing terminal | |
| EP3220167B1 (en) | Steering for coverage in seismic surveys | |
| US20140104984A1 (en) | Flared pseudo-random spiral marine acquisition | |
| CN113009417B (en) | Submarine acoustic array formation estimation method utilizing sound field interference characteristics | |
| US9903969B2 (en) | Survey coverage parameters | |
| EP2788793A1 (en) | Method and apparatus for sea current aided, enhanced azimuth seismic data acquisition | |
| CN113703050B (en) | Secondary positioning method for deep-sea seismic vertical cable | |
| US20140241119A1 (en) | Far-field detection device, system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |